Got my transmission fluid changed at my local shop. Came out 40$ cheaper than the stealership and its done right
With the Tacoma's, you only have to change out the fluid every 100k. So its not that bad versus my step dads diesel having to do it every 45k(I think?). My moms BMW never has to have the fluid changed. Must be nice!
Depends how its used. Toyota's service recommendation is to
inspect at 100k and every 25k thereafter and service as needed. Toyota CLAIMS world standard fluid never needs to be changed, only drain and fill if the fluid appears to have a problem.
I'm gonna go ahead and say it: This is bullshit, because oil is oil. It breaks down in the presence of heat/pressure. Eventually, the additive pack WILL go bad. It doesn't need changing nearly as often as engine oil because no combustion is going on in the tranny...but it still needs to be changed, ESPECIALLY if you put your truck through harsh use, which most of us do.
I only have 62k miles.. but its 5+ years old, shits been abused.. towed in 100+ degree temps.. wheeled in super dusty conditions.
I just did my first drain and fill at 25k miles, and I'll be doing it annually or every 10k (whichever comes first) here on out. Wheeling is hard on auto trannies...the torque converter especially generates a LOT of heat when near full stall, which is where we spend most of our time when crawling...close to idle, which is when the most heat is generated.
As stated, my solution is to drain/fill every 10k miles to keep the lubricant fresh. Each drain/fill replaces ~3 qts of fluid in a ~12qt system, so doing that every year or every 10k should keep both viscosity and additive levels very happy, even under harsh use.
For people staying on pavement, I'd recommend every 50k for daily-driver use and every 30k if you regularly tow/haul loads.
On another note, swapped out my rear diff fluid today. It had been in for about 2k miles, about 1.5k of that with the new traction bar installed. I was surprised how much more metal was shaved. Definitely worth changing it out in a few thousand miles after install.